squares of prime numbers
Squares of prime numbers are the only numbers with three factors, since there must be only one nontrivial divisor for a number to have three factors. That number must thus be prime.
there are only 2 factors because 3 is a prime number: the factors are 1 and 3
If a number has three factors, it's a perfect square. One of those three factors (apart from 1 and the number itself) would be the square root.
Any square of a prime number. For example, 5*5 = 25 has the factors 1, 5, 25. If you square any other prime number, call it "p", the factors of the result are 1, p, p square.
Prime numbers have two factors. Prime squares have three factors. Square numbers have an odd number of factors but that number varies.
A square number
The numbers with only three factors are squares of prime numbers.
Okay, whoever said that a number can only have an even number of factors IS Wrong Take a prime number and square it. If you square a prime number, the number you get will only have 3 factors. For example, if I squared the number 3, I would get 9. 9 only has three factors: 9, 3, 1 Any prime number squared has Three factors.
3 is a prime number; its only factors are 1 and itself.
A number has exactly three factors if and only if it is the square of a prime number.
Squares of prime numbers are the only numbers with three factors, since there must be only one nontrivial divisor for a number to have three factors. That number must thus be prime.
It will be the number with only 2 factors
It is 103 which is a prime number because it has only two factors which are itself and one
101 is the first three-digit prime number.
The only factors of 23, which is a prime number, are 1 and 23.
25
25